Feed-cup for explosive-engines.



Patented Aug. 27, |90I.

2 sneefs-snet E. WESTMAN.

FEED CUP FOR EXPLSIVE ENGINES.

@Application led Nov. 2, 1900.\

(No Model.)

Patented Aug. 27, 190i. E wESFMA-.hh

FEED GEHr FDR EXPKQSNEEMGINES.

(Applicatiam ledi Hum, 2.. 1900.1

2 Sheets-Sheet 2.

(No Manel.)

y l lll-...llnmmllli l 1 l I L! UNITED STATES PATENT OFFICE.

EMIL WESTMAN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO TIIE ENTER- PRISEMACHINE COMPANY, OF SAME PLACE, (PARTNERSHIP COMPOSED OF NVILLIAM KAMPFFAND N. G. SAMPSON.)

FEED-CUP FOR EXPLOSIVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 681,382, dated August27, 1901.

Application filed November 2, 1900. Serial No. 35,208. (No model.)

To all whom. t may concern: v Be it known that I, EMIL WESTMAN, acitizen of the United States, residing at Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Feed-Oups for Explosive-Engines; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable oth- Io ers skilled in the art to whichit appertainsto make and use the same. My invention has for its objectto provide an improved feed-cup for explosive-engines. To this end myinvention consists of the I 5 novel devices and combinations of deviceshereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein likenotations re- 2o fer to like parts throughout the several views. In saiddrawings, Figure 1 is aview, partly in elevation and partly in section,with some portions broken away, illustrating my improved feed-cup asapplied in Working position. Fig. 2 shows the feed-cup detached invertical section on the line x6 c6 of Fig. 1. Fig. 3 is a view of thecup in horizontal section on the line x7 m7 of Fig. 2; and Fig. 4. is aview showing the feed-cup,partly in elevation 3o and partly in section,on line ms x8 of Fig. 3.

The valve-chest 2 is attached to the cylinder-casting 3 in the customaryor any suitable way. The valve-chest 2 is tapped by an exhaust-pipe 21.The intake-valve 8 of the 55 engine is seated in the branch 22EL of asuitable casing, the other branch of Which 'is marked 22D. Thisvalve-casing 22a 22b is detachably secured to the valve-chest 2 and issuitably recessed to afford the commingling- `4o chamber for theexplosive mixture, which is drawn into the engine under thesuctionstroke of the piston. The part 22b of the valve-Casin g projectsat right angles from the part 22 of the casing, as clearly shown in Fig.1, and is tapped by the air-supply pipe 23 and the feed-cup 24, whichwill new be described in detail.

The feed-cup 24. is preferably formed with a glass body c and metallicends c c2. The

bottom end c' is preferably made in the form of a casting, having formedintegral therewith an inlet-pipe section c3, tapped by the oil-supplypipe 25, leading from the pump or other source, a dischargehead c4,having formed therein a passage c5 for delivering the oil from thefeed-cup to the comminglingchamber of the engine, an overflow-pipesection c5, tapped by a return-pipe 26, leading back to thegasolene-tank, (not shown,) and a starting cup or cell c7, tapped by apassage cs, leading to the ou tlet or delivery section of thedischarge-passage c5 from the head c4 of the feed-cup 24. Said passagec8 from the starting cup or cell o7 is normally closed by a hand-valve27. The inlet-pipe section o3 of the feed-cup is shown as plugged orclosed at its upper end, but as provided with lateral discharge-openingsnear its top. The overflow-pipe section c6, receiving from its openupper end, determines the height of the oillevel which is maintainedwithin the feedcup. The discharge-passage c5 Within the discharge-headc4 receives the oil from a point below the oil-level in the cup,preferably from near the bottom of the cup, as shown in Fig. 6, and thenrises, as shown, within the cup itself to a point above the oil-level inthe cup and is subject to va needle -valve 28, seated in the head c4,and passses thence downward and outward, as shown, through theprojecting and screw-threaded end of the discharge-head c4. As shown,the needlevalve 28 has screw-threaded engagement with an internal threadformed in the reduced upper end portion of the discharge-head c4. Theneedle-valve 28 is provided with an airinlet duct f for a purpose whichwill presently appear. rlhereduced upper end portion of thedischarge-head c4 is screw-threaded on its exterior and is tappedthrough the cap of the cup and engaged by a draw-nut o9 as aconvenientmeans for clamping together the ends and the body of the cup. Theneedlevalve 28 is also screw-threaded on its exterior and is engaged bya set-nut 29 for locking the valve in whatever position it may be set.The lower end projecting portion of the discharge-head c4 beingscrew-threaded, as

shown, affords a convenient means for ap'- plying the; cup directly tot'ne top of the intake-valve casing, as best shown in Fig. 3.

With this construction and disposition of the parts of the feed-cup theaction thereof is as follows: The gasolene or other oil is supplied fromthe pump orother source to the feedcu p through the inlet-pipe sectionc3 and will accumulate therein to the level of the overflow-pipe sectionc6. The oil is drawn from the feed-cup under the suction action from theengine-piston when making the suctionstroke. The oil having been startedthrough the passage c5 by the suction-stroke of the engine-piston wouldcontinue to iiow after the piston had completed its Suction-stroke outhe si phon principle, owing to the relative levels of the feed-cup andthe point of discharge to the commiugling-chamher of the engine, were itnot for the presence of the airduct f in the needle-valve 28. Thisair-duct f in the needle-valve 28 aords a supply of air to the oil-feedpassage c5, thereby preventing the establishment of any siphon action inthe delivery-passage from. the feed-cup, and also serving the furtherimportant function of introducing a small jet or current of air at theaxial center of the moving column of oil within the discharge-section ofthe deliverypassage c5 from the feed-cup. Hence more or less air will becom mingled with theoil be;= farei@ reaches the Commingliug-chember ormain airTsupply pipe of the engine. At the point of delivery to the mainair-snpply pipe the inmoving column of oil contains afjet of air at itscenter or axis and is then en veloped on its exterior by the inrushingbody of air from the air-supply pipe 23, thus insuring a most thoroughcommingling of the air and the oil before reaching the intake-valve 8.The starting cup or cell c7 is of less height than the overflow-pipesection c6, and hence when the engine is running the starting-cell willconstantly be full of oil. As the feed-cup stands above the level of theeomminglingchamber in the intake-valve casing, itis of course obviousthat the oil will flow by gravity from the starting cup or cell c7whenever so desired. To obtain a starting charge of oil, it is thereforeonly necessary to open the passage c8 from the starting-cup c7 byinanipulating the hand-valve 27. This is a great convenience, as' itenables the engine to be started very quickly. In order that thestartthe feed-cup 2t by gravity, as is desirable for quick` starting, itfollows that the feed-cup 24 must b e above the level of the point ofdischarge of the oil within the comminglingchamber of the engine. Itfollows that the delivery-passage c5 for the normal oil-feed from thefeed-cup 24 must at some point between the inlet thereto and thedischarge therefrom rise above the liquid-level within the feed-cup, orotherwise the, c1111 would empty by gravity. As shown, the delivery orfeed passage c5 from the feed-cup rises above the oil-level of ,the cupwithin the cup itself. The rise, however, might be outside the cup if asuitable pipe were employed. It is convenient that the duct cS from thestarting-cell should tap the main or normal feed-passage c5 from thecup. With that construction it follows that the point of discharge intothe commingling-chamber must be below the liquid-level of the cup inorder to permit the starting charge from the cell c7 to flow by gravitytherethrough. Hence a siphon action would necessarily follow were it notfor the presence of the supply of air to the said delivery-passage c5through the ductf of the needle-valve 2S or other means provided forthat purpose. Of course the air-supply to the said feed-passage c5 mightbe otherwise obtained than through the controlling-valve 28,

so far es preventing the Siphon action is con#l c erncd. Theneedle-valve 28 might also be applied to the delivery-passage cffromthe. feed- Gur at any other convenient point, and nevera thelessbeprovided with the open airdnctf, as long as the top 0f the duct f wasabove the Oillevel in the cup.` The construction illustrated is,however, the most convenient. The feed cup as thus constructed is alsoextremely simple and cheaply made. Without the airinlet to thedelivery-passage from the feedcup l found by experience that an excessive feed of oil occurred under the Siphon action after thesuction-stroke of the pistou .had ended. This greatly interfered withthe best action of the engine and also Wasted oil. This provision ofmeans for breaking the Siphon or preventing any Siphon action from thefeed-cup is one of the most important features of my invention. Thegravity-feed starting-cell crl is another.

It will be understood that the details of my invention may be changedwithout departing from the spirit thereof. s

What I claim, and desire to `Secure by Letters Patent of the UnitedStates, is as follows:

1. A feed-cup for explosiveenginesmaving 1 an inlet for receiving thegasolene or other hydrocarbon, from the pump or other source,

an overiiow-outlet from a point above the bottom of the cup, a dischargeor engine-'feed passageV which, at some point between its rejceiving anddelivery ends, rises above the liquid-level in the cup and delivers tothe en; gine below the bottom o f said cup, and which diseharge-passageis provided with an air; ing charge may feed from the cell c" withininlet, whereby any Siphon action from said passage is prevented and aportion of air enters with the hydrocarbon oil, substantially asdescribed.

2. A feed-cupfor explosive-engines having an inlet for receiving thegasolene or other hydrocarbon oil from the pump or other source, anovertlowioutlet from a point above the bottom of the cup, a` dischargeor enginefeed pass'ige, which, at some point, between its receiving anddelivery ends, rises above the liquid-'level in the cnp and delivers tothe engine, below the bottom of said cup, and a IOO needle-valve seated1n said discharge-passage, for controlling the same, and provided withan axial air-inlet duet, substantially as and for the purposes setforth.

3. In au explosive-engine, the combination with the normal feed devicesfor the gas or oil, of a gravity-feed starting cell or cup normallycharged from said main feed devices and provided with a hand-valve,substantially as and for the purposes set forth.

4. Afeed-cup for explosive-engines,having an inlet for the oil or gas,an overflow-outlet from a point above the bottom of the cup, adischarge-passage for the normal feed to the engine, and a starting cellor cup below the oil-level Within said main feed-cup, and equipped witha hand-valve controlling the delivery-passage therefrom, substantiallyas and for the purposes set forth.

5. The feed-cup 24, having the oil or gas inlet c3, the overfiow-outletc, the dischargehead c4 provided with the discharge-passage l EMILwEs'rMAN.

'Witnessesz GEO. D. SAMPsoN, WM. KAMPFF.

